User interface for a computer display screen



FIG. 1 is a front view of a user interface for a computer display screen;

FIG. 2 is a front view of a second embodiment thereof;

FIG. 3 is a front view of a third embodiment thereof; and,

FIG. 4 is a front view of a fourth embodiment thereof.

The broken line showing of the display screen is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for user interface for a computer display screen, as shown and described. 